Dimethicone CAS#9006-65-9

CAS Number: 9006-65-9
Chemical Formula: C6H18OSi2
Synonyms:

POLYDIMETHYLSILOXANE 1'850
POLYDIMETHYLSILOXANE 173'000
POLYDIMETHYLSILOXANE 16'000

Appearance: Transperant Liquid

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Dimethicone CAS#9006-65-9

Dimethyl silicone is also known as methyl silicone oil and polydimethylsiloxane liquid. It appears as colorless transparent viscous liquid, being tasteless, odorless and non-toxic. The molecular formula is CH3 [Si (cH3) 2] nSi (CH3) 3. The average molecular weight is 5000 ~ 100000. Based on the differences on the molecular weight, kinematic viscosity varies from 1.0 × 10-6 ~ 100000 × 10-6 square meters / second. Long-term use temperature range is -50 ~ 180 ℃. In isolated air or inert gas, it can be subject to long-term use at 200 ℃. Viscosity coefficient: 0.31 ~ 0.61. Surface tension: 1.59 ~ 2.15 × 10-4N / cm. Dielectric constant (23 ℃, 100Hz): 2.18 ~ 2.17. Volume resistivity (23 °C): 1.0 × 1014 to 1.0 × 1016Ωcm3. Dielectric loss tangent (23 ℃, 100Hz):0.00002~0.00004. Breakdown voltage strength: 13.7 ~ 17.7kV / mm. It is soluble in benzene, toluene, xylene and ethyl ether, partially soluble in ethanol, butanol and acetone, insoluble in cyclohexanol, methanol, paraffin oil and vegetable oil. It has excellent hydrophobic moisture resistance, good light transmission, and chemical stability. Widely used in insulation, heat, moisture-proof filler, defoamer, mold release agent, lubricant and surface treatment agent. It is produced by the reaction between octamethylcyclotetrasiloxane and hexamethyldisiloxane in the presence of concentrated sulfuric acid or tetramethylammonium hydroxide catalyst.

Dimethicone

Dimethicone Chemical Properties

density	1 g/mL at 20 °C
vapor pressure	5 mm Hg ( 20 °C)
refractive index	n20/D 1.406
Fp	121 °C
storage temp.	Refrigerator
solubility	Practically insoluble in water, very slightly soluble or practically insoluble in anhydrous ethanol, miscible with ethyl acetate, with methyl ethyl ketone and with toluene.
color	Colourless
Stability:	Stable. Combustible. Incompatible with strong oxidizing agents, reducing agents, organics, acids, alkalis. Corrodes many metals.
Major Application	pharmaceutical (small molecule)
Cosmetics Ingredients Functions	ANTIFOAMING SKIN PROTECTING SKIN CONDITIONING - EMOLLIENT SKIN CONDITIONING
Cosmetic Ingredient Review (CIR)	Dimethicone (9006-65-9)
InChI	InChI=1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3
InChIKey	UQEAIHBTYFGYIE-UHFFFAOYSA-N
SMILES	O([Si](C)(C)C)[Si](C)(C)C
LogP	3.646 (est)
CAS DataBase Reference	9006-65-9
EPA Substance Registry System	Dimethicone (9006-65-9)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	24/25-26
WGK Germany	3
RTECS	TQ2690000
Storage Class	11 - Combustible Solids
Hazardous Substances Data	9006-65-9(Hazardous Substances Data)

Product Application of Dimethicone CAS#9006-65-9

dimethicone is a form of silicone used to give products lubricity, slip, and good feel. It can also serve as a formulation defoamer and help reduce the feeling of greasiness that some creams leave on the skin immediately upon application. In addition, dimethicone is reported to protect the skin against moisture loss when used in larger quantities. It improves product flow and spreadability. In combination with other ingredients, dimethicone becomes a good waterproofing material for sunscreen emulsions, and helps reduce the greasiness often seen in high-SPF preparations.

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